ISY-99i/ISY-26 INSTEON:The Ceiling Fan
The saga of the ceiling fan and controlling it with home automation is a long one. Many users have discussed options to control them, to keep them quite, and not damage them when using the standard dimmer for fan speed control.
This page is a work in progress...
http://www.smarthome.com/forum/topic.asp?TOPIC_ID=362
http://www.smarthome.com/forum/topic.asp?TOPIC_ID=1579
http://www.edcheung.com/automa/nohum.htm
http://www.edcheung.com/automa/nohumkit.htm
http://www.freeinfosociety.com/electronics/schematics/motor/pictures/ceilingfanspeedcontrol.png